PCIe-USB card stopped working

[agent_kith]

Managed to diagnose a faulty USB card. Why it became faulty or whether that is related to the faulty LAN port I don't know. Progress at least. Working now with a substitute USB card using original clock.

RMA it.

My bad was during the diagnosis. I swapped in a different card and clock but used the wrong frequency clock. Spent a full day tracking my self-made problem before getting back to the original problem. D'Oh! 

That makes sense, wrong rate will give the impression the cable or connection is bad. That's a nice one.